| Degradative characteristics of synthetic pyrethroid insecticides was determined by the crude enzyme extracted from the isolated strain YF11 of Alcaligenes sp..The crude enzyme activities have optimum pH of 8.0,8.5,8.0,8.0,9.0,7.5 for enzymatic degradation of fenvalerate,fenpropathrin, cypermethrin,deltamethrin,permethrin,cyhalothrin,and has optimum temperature of 32.5℃.The Michaelis-Mentn'constans are 41.4,136.8,64.36,222.8,5.2,8.67,respectively.The crude enzyme is effective at pH values range of 5.0—10.5. |
